Abstract
It has been shown, in a pot, culture trial, that the addition of EDTA to a neutral, manganese-deficient, organic soil increased the uptake of native manganese by oats. However, manganese uptake from large additions of manganous sulphate was lowered in the presence of EDTX. EDTA increased the uptake of iron and copper from this soil by oats at all yield levels. No increase in uptake of iron, copper, or manganese occurred if EDTA was added to the same soil limed to pH 8. These results are discussed in relation to other reports of the effect of EDTA on plant uptake of micronutrient metals from solution and from soils. It is pointed out that aluminium may replace divalent metals in EDTA complexes added to soils. Such substitution might occur more rapidly at pH 8 than at pH 6-7 because of the larger amount of aluminium in solution at the higher pH. It is suggested that this reaction may explain the failure of EDTA to increase uptake of micronutrient metals from the limed soil in these experiments. Uptake of copper and iron from the untimed s oil, in both presence and absence of added EDTA, appears to be linearly related to total transpiration of the oats during their growth. It is thought that this may reflect the dependence of oats in this soil on soluble anionic metal complexes brought to the roots with soil moisture. In a second pot experiment, uptake of added manganese was increased by EDTA added 3-4 weeks after the manganous sulphate. In this case the manganous sulphate would have been mostly oxidized when the EDTA was added. It is suggested that EDTA may speed up the biological oxidation of manganous salts in neutral soils. If this were so, plants not treated with EDTA in the first experiment might have absorbed more added manganese early in their growth and maintained a higher manganese content throughout the season than plants treated with EDTA. In the second experiment, the effect of EDTA on manganese oxidation would be largely eliminated, and the effect in increasing water-soluble manganese in the soil mould become discernible. In this second experiment, EDTA prevented the occurrence of grey speck disease, whereas addition of hydroquinoue failed to do so. Nevertheless ,plants treated with hydroquinone contained as much manganese as, or more than, those treated with EDTX. This result is discussed in relation to the "manganese requirement," of oats.
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Claims 8
Claim · model-written summary
EDTA addition increased native manganese uptake by oats in a pot culture trial.
- Taxon
- oats
Avena sativae1 - Treatment
- addition of EDTAe1
- Outcome
- uptake of native manganesee1
- Direction
- increasede1
- Setting
- in a pot, culture triale1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“It has been shown, in a pot, culture trial, that the addition of EDTA to a neutral, manganese-deficient, organic soil increased the uptake of native manganese by oats”
Claim · model-written summary
Manganese uptake from large additions of manganous sulphate was lowered by oats in the presence of EDTX.
- Taxon
- oatsAvena sativae1
- Treatment
- large additions of manganous sulphatee2
- Outcome
- manganese uptakee2
- Direction
- lowerede2
- Qualifier
- in the presence of EDTXe2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“It has been shown, in a pot, culture trial, that the addition of EDTA to a neutral, manganese-deficient, organic soil increased the uptake of native manganese by oats”
e2“manganese uptake from large additions of manganous sulphate was lowered in the presence of EDTX”
Claim · model-written summary
EDTA increased the uptake of iron and copper from a soil by oats at all yield levels.
- Taxon
- oatsAvena sativae3
- Treatment
- EDTAe3
- Outcome
- uptake of iron and coppere3
- Direction
- increasede3
- Qualifier
- at all yield levelse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“EDTA increased the uptake of iron and copper from this soil by oats at all yield levels”
Claim · model-written summary
No increase in iron, copper or manganese uptake by oats occurred when EDTA was added to the same soil limed to pH 8.
- Taxon
- oatsAvena sativae1
- Treatment
- EDTA was added to the same soil limed to pH 8e4
- Outcome
- uptake of iron, copper, or manganesee4
- Direction
- No increasee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“It has been shown, in a pot, culture trial, that the addition of EDTA to a neutral, manganese-deficient, organic soil increased the uptake of native manganese by oats”
e4“No increase in uptake of iron, copper, or manganese occurred if EDTA was added to the same soil limed to pH 8”
Claim · model-written summary
EDTA prevented grey speck disease in oats, whereas addition of hydroquinoue failed to do so.
- Taxon
- oatsAvena sativae1
- Treatment
- EDTAe5
- Outcome
- occurrence of grey speck diseasee5
- Direction
- preventede5
- Comparator
- addition of hydroquinouee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“It has been shown, in a pot, culture trial, that the addition of EDTA to a neutral, manganese-deficient, organic soil increased the uptake of native manganese by oats”
e5“EDTA prevented the occurrence of grey speck disease, whereas addition of hydroquinoue failed to do so”
Claim · model-written summary
Oat plants treated with hydroquinone contained as much manganese as, or more than, plants treated with EDTX.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“It has been shown, in a pot, culture trial, that the addition of EDTA to a neutral, manganese-deficient, organic soil increased the uptake of native manganese by oats”
e6“plants treated with hydroquinone contained as much manganese as, or more than, those treated with EDTX”
Claim · model-written summary
EDTA added 3-4 weeks after manganous sulphate increased uptake of added manganese by oats in a second pot experiment.
- Taxon
- oatsAvena sativae1
- Treatment
- EDTA added 3-4 weeks after the manganous sulphatee7
- Outcome
- uptake of added manganesee7
- Direction
- increasede7
- Setting
- second pot experimente7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“It has been shown, in a pot, culture trial, that the addition of EDTA to a neutral, manganese-deficient, organic soil increased the uptake of native manganese by oats”
e7“In a second pot experiment, uptake of added manganese was increased by EDTA added 3-4 weeks after the manganous sulphate”
Claim · model-written summary
Copper and iron uptake from the untimed soil by oats appears linearly related to total transpiration.
- Taxon
- oatsAvena sativae0
- Outcome
- Uptake of copper and irone0
- Qualifier
- linearly related to total transpiratione0
- Setting
- untimed s oile0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Uptake of copper and iron from the untimed s oil, in both presence and absence of added EDTA, appears to be linearly related to total transpiration of the oats during their growth”
The same questions in other papers
ethylenediaminetetraacetic acid · nutrient: content · Avena sativa (oats)Positive and negative results
1 in the opposite direction
- no effect
sulfate · nutrient: content · Avena sativa (oats)Results agree
1 paper in the same direction as this paper
- positive
ph · nutrient: content · Avena sativa (oats)Positive and negative results
3 in the opposite direction
- positive
- positive
- positive
lime · nutrient: content · Avena sativa (oats)Positive and negative results
4 in the opposite direction
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.